I installed BLP billets in my 80186-1 Dominator. I've been trying to get the idle clean, but it's still on the rich side. Current set up is:IFR 040IAB 066TSJ 055MAB .028MJ 92Emulsion holes026P026PPMixture screws are 1.5 turns out. T-slots are square. The engine will idle at 1100 with light pressure on throttle. I don't have to feather it to keep it running.

Hi Ron, just for comparison I have an older 1050 with 750 blocks and I think a .055 tsj, .038 ifr, and a .076 iab. It wont idle cold and pops a little in the shut down area so maybe a little lean, I'll try a .070 iab to see how it works but crisp as can be and comes up on the brake quick! Good luck

Don't be afraid to go down a little more on the idle bleed if needed, each one can be a little different. Run the engine cold up to 2000 RPM out of gear, put your finger over one or two idle bleeds. The RPM should pick up. Do it again with the engine warm, it should not pick up or even slightly lower if the idle jet and bleed are close to size to have enough fuel for the transition circuit. Once you can do this the mixture screws usually end up 1-1 1/4 turns out, but anywhere from 3/4 to 1 3/4 will do.

I forgot to mention in my original post that I got this carb with a .125 hole in each primary blade on the wrong side of the shaft. Nomad suggested the possibility of turning them around to correct the hole location, but I haven't done that. It also has BLP banjos and inserts, so it's not a 750 anymore.

Mark, I hope your feeling better everyday. When you say go down on IAB, do you mean smaller? It acts fat now.

I'll try suggested stuff, but only one at a time. Looking over my old Tuner notes I came across one where he told me that the secondary slots don't have to be the same as the primaries. Tuner's comments on that are posted on page 3 of the sticky about tuning t-slots

Idle jet and bleeds need to be set for the needs of the transition circuit, if you try the test I laid out above it will give you an idea which way to go. Idle fuel is further leaned by the mixture screws, so you adjust them as needed for idle. Is the timing lock out on your engine?

I've made a few changes but blocking a IAB still kills 500 rpm. This where I'm at:IJ .035IAB .076TSJ .055MAB .028MJ 92Mixture screws at 3/4 out. I'm thinking an .080 IAB and then .031 IJ. You like that plan? These numbers seem a little extreme from all the others I've read about.

How many turns out are the mixture screws? Also, make sure you don't have a leaky PV gasket. One other possibility, some carbs have trouble getting the square vacuum port in the main body to seal right against the metering block at the bottom of the emulsion well. On those you can take some gas tank epoxy, fill the hole, and file it smooth once it's dry.